Copper Alloy C70600 vs C71900
Copper Alloy · grade comparison
Copper Alloy C70600 and C71900 are both copper alloy grades. C71900 is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 120 MPa (17.4 ksi) for C70600, about 4.6 times as much; tensile strength follows at 760 MPa (110 ksi) vs 310 MPa (45 ksi). In exchange, C70600 is the more ductile: elongation 40% versus 15% for C71900, and C71900 is harder (230 HB vs 65 HB). C71900 is stiffer (152 GPa vs 124 GPa) and C70600 conducts heat better (40 W/m·K vs 32 W/m·K). On the shop floor, C70600 welds better (excellent vs good).
C70600Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
C71900Choose it when strength drives the design.
C70600 vs C71900: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all copper alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all copper alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Same in both: Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 8.94 g/cm³0.32 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 377 J/kg·K0.09 BTU/lb·°F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 78 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Machinability 28 / 100 · Machinability Rating (AISI 1212 = 100 %) 20% · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Energy (primary production) 75 MJ/kg32,244 BTU/lb · Embodied Water 320 L/kg38.3 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every copper alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | C70600 | C71900 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 4 finishes: Copper Plating, Electroless Nickel (EN), Gold Plating, Silver Plating.
C70600 vs C71900 — frequently asked
Is C71900 stronger than C70600?
Yes. C71900 has a typical yield strength of 550 MPa (79.8 ksi) against 120 MPa (17.4 ksi) for C70600 — about 4.6 times as much. Tensile strength is 760 MPa (110 ksi) vs 310 MPa (45 ksi).
Which is cheaper, C70600 or C71900?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, C70600 or C71900?
C70600. Its weldability rates excellent (92/100) against good (55/100) for C71900.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C70600 and C71900 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.